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USPS Track & Confirm API

The U.S. Postal Service provides a suite of USPS Web Tools that customers may integrate into their own websites to validate or find mailing addresses, track and confirm mail delivery, calculate shipping rates, and create domestic or international shipping labels.
The Track & Confirm APIs provide estimated delivery information and the ability to track packages through the shipping process. It applies to packages shipped through the following services: Priority Mail, Express Mail, as well as Package Services (including Standard Post, Bound Printed Matter, Library Mail, Media Mail) that include Delivery Confirmation.

ShipStation is a web-based shipping solution that streamlines the order fulfillment process for online retailers. With real-time integrations into popular marketplaces including Amazon, eBay, Sears,...

The ProgrammableWeb directory has over 70 package tracking APIs to help educate developers on available shipment tracking options. The APIs contain various features such as package arrival verification, scanning services, price comparison, and more. Click here to learn about 7 of those APIs.

This National Digital Identity Webhooks API is a Singapore Trusted Identity SG-Verify service that enables residents with the ability to perform identity verification and data transfer using scanned...

The Hansard API provides an open way to consume Hansard documents and metadata, including information for Sitting Dates, Members, Bills, and more. Hansard (the Official Report) is the edited verbatim...